Remove ChildProcess.HangRendererType.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 4818 matching lines @@
   }
 }
 
 void WebContentsImpl::OnIgnoredUIEvent() {
   // Notify observers.
   for (auto& observer : observers_)
     observer.DidGetIgnoredUIEvent();
 }
 
 void WebContentsImpl::RendererUnresponsive(
-    RenderWidgetHostImpl* render_widget_host,
-    RendererUnresponsiveType type) {
+    RenderWidgetHostImpl* render_widget_host) {
   for (auto& observer : observers_)
     observer.OnRendererUnresponsive(render_widget_host);
 
   // Don't show hung renderer dialog for a swapped out RVH.
   if (render_widget_host != GetRenderViewHost()->GetWidget())
     return;
 
   if (ShouldIgnoreUnresponsiveRenderer())
     return;
 
-  // Record histograms about the type of renderer hang.
-  UMA_HISTOGRAM_ENUMERATION(
-      "ChildProcess.HangRendererType", type,
-      RendererUnresponsiveType::RENDERER_UNRESPONSIVE_MAX);
-
   if (!GetRenderViewHost() || !GetRenderViewHost()->IsRenderViewLive())
     return;
 
   if (delegate_) {
     WebContentsUnresponsiveState unresponsive_state;
-    unresponsive_state.reason = type;
     unresponsive_state.outstanding_ack_count =
         render_widget_host->in_flight_event_count();
     unresponsive_state.outstanding_event_type =
         render_widget_host->hang_monitor_event_type();
     unresponsive_state.last_event_type = render_widget_host->last_event_type();
     delegate_->RendererUnresponsive(this, unresponsive_state);
   }
 }
 
 void WebContentsImpl::RendererResponsive(
@@ skipping 527 matching lines @@
     RenderViewHost* render_view_host = RenderViewHost::From(render_widget_host);
     if (!render_view_host)
       continue;
     render_view_host_set.insert(render_view_host);
   }
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 }  // namespace content